如何从可调整大小的窗口中删除最小化和最大化按钮? [英] How to remove minimize and maximize buttons from a resizable window?

问题描述

WPF 不提供允许调整大小但没有最大化或最小化按钮的窗口的能力.我希望能够制作这样一个窗口，以便我可以拥有可调整大小的对话框.

WPF doesn't provide the ability to have a window that allows resize but doesn't have maximize or minimize buttons. I'd like to able to make such a window so I can have resizable dialog boxes.

我知道该解决方案意味着使用 pinvoke，但我不确定该调用什么以及如何调用.搜索 pinvoke.net 并没有发现任何我需要的东西，主要是因为 Windows Forms 确实提供了 CanMinimize 和 CanMaximize 其窗口上的属性.

I'm aware the solution will mean using pinvoke but I'm not sure what to call and how. A search of pinvoke.net didn't turn up any thing that jumped out at me as what I needed, mainly I'm sure because Windows Forms does provide the CanMinimize and CanMaximize properties on its windows.

有人可以指点我或提供有关如何执行此操作的代码(首选 C#)吗?

Could someone point me towards or provide code (C# preferred) on how to do this?

推荐答案

我偷了一些在 MSDN 论坛上找到的代码，并在 Window 类上做了一个扩展方法，如下所示:

I've stolen some code I found on the MSDN forums and made an extension method on the Window class, like this:

internal static class WindowExtensions
{
    // from winuser.h
    private const int GWL_STYLE      = -16,
                      WS_MAXIMIZEBOX = 0x10000,
                      WS_MINIMIZEBOX = 0x20000;

    [DllImport("user32.dll")]
    extern private static int GetWindowLong(IntPtr hwnd, int index);

    [DllImport("user32.dll")]
    extern private static int SetWindowLong(IntPtr hwnd, int index, int value);

    internal static void HideMinimizeAndMaximizeButtons(this Window window)
    {
        IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(window).Handle;
        var currentStyle = GetWindowLong(hwnd, GWL_STYLE);

        SetWindowLong(hwnd, GWL_STYLE, (currentStyle & ~WS_MAXIMIZEBOX & ~WS_MINIMIZEBOX));
    }
}

唯一要记住的另一件事是，由于某种原因，这在窗口的构造函数中不起作用.我通过将其放入构造函数中来解决这个问题:

The only other thing to remember is that for some reason this doesn't work from a window's constructor. I got around that by chucking this into the constructor:

this.SourceInitialized += (x, y) =>
{
    this.HideMinimizeAndMaximizeButtons();
};

希望这会有所帮助！

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